(19)

(11)

EP 1 994 691 A1

(12)

(43) Date of publication: 26.11.2008 Bulletin 2008/48 (21) Application number: 06751551.0 (22) Date of filing: 26.04.2006

(51) International Patent Classification (IPC):  H04L 12/56(2006.01) (86) International application number: PCT/US2006/015894 (87) International publication number: WO 2007/106102 (20.09.2007 Gazette 2007/38)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR (30) Priority: 13.03.2006 US 374335 (71) Applicant: Tellabs Operations, Inc. Naperville, IL 60563 (US)	(72) Inventors: MACK-CRANE, Benjamin, T. Dowers Grove, Illinois 60516 (US) SADLER, Jonathan, B. Naperville, Illinois 60563 (US) (74) Representative: Ljungberg, Robert  Baker Botts (UK) LLP 41 Lothbury London EC2R 7HF London EC2R 7HF (GB)